Below are links to the 14 valuation maps that cover the Greenville Spur of the Fitchburg Line, the spur that contains the Squannacook River Rail Trail. These maps can be found at the Massachusetts Registry of Deeds, and are referenced from the MBTA's main deed which may be found in the South Middlesex Registry of Deeds, Book 13156, Page 034, dated Feb 16, 1977.
Maps 6-10 cover the existing Squannacook River Rail Trail. Map 5 covers the planned extension into Groton, and maps 10-14 cover the planned extension to the New Hampshire line.
Click on any link to see a jpeg of that valuation map. The valuation maps are each around 10 MB in size.
 
| Number | Mileage from Ayer at end of map | Description |
|---|---|---|
| One | 2.06 | Ends just north of Nashua River, Ayer/Groton line |
| Two | 2.95 | Groton State Forest |
| Three | 3.97 | West Groton Center |
| Four | 4.95 | Hollingworth and Vose |
| Five | 5.95 | Along Townsend Road |
| Six | 6.95 | Townsend/Groton line |
| Seven | 7.95 | Just before South Street |
| Eight | 8.95 | Harbor Pond/Old Meetinghouse Road |
| Nine | 9.95 | Approaching Townsend Center |
| Ten | 10.95 | Depot, Route 13, first trestle |
| Eleven | 11.95 | Route 119 crossing, second trestle |
| Twelve | 12.95 | Dudley, Old Turnpike |
| Thirteen | 13.45 | Townsend State Forest |
| Fourteen | 14.08 | New Hampshire border |